[Update] G Suite limiting access to less secure apps starting October 30, 2019
The bastards HATE people using something like thunderbird, because then you don't have to log into goog with your web browser and they have a harder time tracking the shit out of you.
They already make it hard to find the 'Allow less secure apps' for individuals and it takes about 4 clicks or so to do it -- if you can find the damn setting.
Next they'll turn off the setting for individuals.